Re: [time-nuts] Affordable PoE 6-digit time displays?

From: Bob kb8tq Hi I think this is one of those really small market items. You can probably cobble one together from bits and pieces for less than you can buy a good one. Bob === For example: http://www.satsignal.eu/raspberry-pi/DigitalClock.html 73, David GM8ARV

[time-nuts] Affordable PoE 6-digit time displays?

I'd hoped that ebay or aliexpress would yield a bounty given how seemingly simple these are, but I'm drawing a blank (and finding a lot of $300+ new options). Anyone have a favorite source for either flat wall-mount or rackmount displays that will pull from an NTP/SNTP/whatever server? (if

Re: [time-nuts] Casio Wave Ceptor wrist watch - quick accuracy test

its drift, but other G-Shocks have been quite good.  It is the higher-end line with tighter specs and they actually have a trimmer inside. David N1HAC On 6/11/18 6:30 AM, Dana Whitlow wrote: I bought a Casio 'atomic watch" about 3 months ago, one which uses the '3405' module. I've also

Re: [time-nuts] Traveling to the US west coast

If Attilla is going to be in the Bay area I would like to come up and maybe have dinner. I live in Fresno, 180 miles south of San Francisco. Dave W6TE -Original Message- From: time-nuts On Behalf Of Pete Stephenson Sent: Friday, May 18, 2018 8:29 PM To:

Re: [time-nuts] Bodnar "Precision Frequency Reference (GPS Clock)" AND LeoNTP Networked Time NTP Server Questions

frequency source feels slightly warm to the touch. There's an e-mail address where you could ask: supp...@leobodnar.com Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk Twitter: @gm8arv

Re: [time-nuts] (UK) NPL open house

. No absolute confirmations yet, as one of the people I wanted to visit is going on jury service tomorrow, but I'm hopeful one of his colleagues can show me around. Dr David Kirkby Ph.D C.Eng MIET Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex

Re: [time-nuts] Anybody have suggestions for time related science fair projects?

Ah. The falling water goes up illusion. https://www.youtube.com/watch?v=GBtHeR-hY9Y -Original Message- From: time-nuts On Behalf Of ed breya Sent: Monday, May 14, 2018 2:01 PM To: time-nuts@febo.com Subject: Re: [time-nuts] Anybody have suggestions for time

Re: [time-nuts] GPS Timing Antenna Failure - Long

There's a great article out there on the web. It takes a bit of digging, but the title is "Low voltage, the incompetent ignition source". They discuss fires on PCBs caused by trace contaminants and dendrite growth. A PCB with sustained flame is shown, powered by a lithium coin cell.

Re: [time-nuts] Anybody have suggestions for time related science fair projects?

What I remember was a brown or black disc with holes around the perimeter. I remember a lot of holes. This was around 1991 or so. -Original Message- From: time-nuts On Behalf Of Bruce Griffiths Sent: Saturday, May 12, 2018 4:39 PM To: Discussion of precise

Re: [time-nuts] Anybody have suggestions for time related science fair projects?

Measuring the speed of light (Fizeau or Michelson method? Other ways) I saw a great demo of this at the Exploratorium in SF. They had a long spool of fiber optic, a disc with holes, and a light source. When static, if the light shines through the hole in the disc into the fiber, then you

Re: [time-nuts] Racal 9475 Rubidium

Most obvious issue - is the Rb "bulb" coated on the inside with a metallic deposit - if so it's time to use a heat gun to move it back to where it belongs. David -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Paul Bicknell Sent: 01 May

Re: [time-nuts] TCVCXO Adjustment

artefact of MRTG with small integers.) Cheers, Davis -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk Twitter: @gm8arv ___ time-nuts mailing list -- time-nuts@

Re: [time-nuts] Dual GPSDO - any advantage?

On 10 April 2018 at 16:56, donald collie wrote: > I have the Chinapost tracking numbers, so I don`t think it`s a scam - just > real good value. I hope you are right, but I doubt you are. It is not uncommon to be sent fake tracking numbers. I was 99% sure a Keithley

Re: [time-nuts] Dual GPSDO - any advantage?

On 10 April 2018 at 17:11, Clint Jay wrote: > Sad to say I think I was right, the listings have been pulled already and > the seller now has zero items for sale. > The listing has not been pulled. Yes the seller has 0 to sell, but because he has sold out of the 100. I still

Re: [time-nuts] Cheap jitter measurements

some code: http://www.satsignal.eu/ntp/TSCtime.html based on: http://www.lochan.org/2005/keith-cl/useful/win32time.html and just messing around! Perhaps it's of interest or use? Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email:

Re: [time-nuts] Dual GPSDO - any advantage?

On 10 April 2018 at 16:23, Dr. David Kirkby <drkir...@kirkbymicrowave.co.uk> wrote: > On 10 April 2018 at 15:32, Clint Jay <cjaysh...@gmail.com> wrote: > >> Ahh, I've found the listing, has anyone received one? >> >> I hate to say this but I'm highly s

Re: [time-nuts] Dual GPSDO - any advantage?

On 10 April 2018 at 15:32, Clint Jay wrote: > Ahh, I've found the listing, has anyone received one? > > I hate to say this but I'm highly sceptical that they will ever turn up, > looks and smells very much like the standard eBay scam to me. > -- > Clint. M0UAW IO83 > I'm

Re: [time-nuts] Cheap jitter measurements

There is a program for the RPi which handles the PPS input for NTP and can produce an output on a GPIO pin here: https://vanheusden.com/time/rpi_gpio_ntp/ but it's user-mode so of limited use. Perhaps the OP could adapt it? Cheers, David -- SatSignal Software - Quality software written

[time-nuts] ADEV dead time w/ HP 53131A & TimeLab

Hi time-nuts, I'm doing oscillator-related research for my PhD and found this list recently. It's been a great resource in trying to refine my freq measurement setup and in starting to understand what's really going on inside my lab equipment. I've been trawling the archives and have a question

Re: [time-nuts] Weird Stuff WareHouse shutting down

On 8 Apr 2018 16:56, "jimlux" wrote: > > Test equipment tends to be aged - Unless you have a particular need for a HP 600 series microwave signal generator, there are probably better sources available much cheaper that use more modern components. In this day and age, I

Re: [time-nuts] Environmental sensor recommendations

> The OCXO is not the temperature problem with the Tbolt. It is the DAC. So is there a better one that can be used to replace it? David -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of ew via time-nuts Sent: 05 April 2018 10:43 To: time-nuts@febo.

Re: [time-nuts] Environmental sensor recommendations.

On 5 April 2018 at 15:44, John Green wrote: > Why has no one mentioned thermocouples? > I had some experience with thermistors a few years back designing thermal > attenuators and equalizers for CATV. NTC thermistors can have a large > change of resistance for a unit change in

[time-nuts] Open day at the National Physical Laboratory (NPL) on Thursday 17 May 2018.

NPL opens their doors to the public once every 2 years. It is well worth going. Tickets are only 3.00 each, and that money is donated to a cancer charity. More details at http://www.npl.co.uk/open-house/ To make the most of it, you need to 1) Arrive early (14:00) 2) Leave when they close

Re: [time-nuts] GPS ANTENNA

attenuator with a DC pass. On Sun, Apr 1, 2018 at 10:21 PM, David C. Partridge <david.partri...@perdrix.co.uk> wrote: > Or use a choke ring survey antenna and an attenuator :) > > Dave > > -Original Message- > From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behal

Re: [time-nuts] GPS ANTENNA

Or use a choke ring survey antenna and an attenuator :) Dave -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob kb8tq Sent: 01 April 2018 14:43 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] GPS ANTENNA Hi Indeed,

Re: [time-nuts] WWV/CHU

On 30 March 2018 at 06:49, Tom Van Baak wrote: > > FYI: for the original spam-free version, please use: > > https://tf.nist.gov/general/pdf/469.pdf > > In general, if the author or paper is related to NIST, the original > copyright-free PDF will be available in the NIST Time

Re: [time-nuts] Setting correct date on Trimble Thunderbolt receiver

AFAIK you can't set the correct date any more - this is the 1024 week rollover problem. Lady Heather does correct the displayed date, as it knows that the reported date is wrong.. David -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of donandarl

[time-nuts] Suggest time-and-tech related locations in Switzerland

Many thanks to everyone who provided suggestions regarding time-and-tech (and other) things to see in Switzerland! I am working through the suggestions. My wife (and mostly) I hope to pack in as many of them as possible. I also look forward to meeting any of you who plan to attend the

Re: [time-nuts] Need a Watch Recommendation

On 5 March 2018 at 16:50, William H. Fite wrote: > And that is just my point--well, part of it, anyway--ultra-precise > measurement of time is profoundly important, and rightly the primary focus > of this group. But for the wrist, very, very few of us need pin-point >

Re: [time-nuts] Terrestrial GPS

I've seen wifi location reporting me almost 2000 miles east of where I am. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

[time-nuts] Suggest time-and-tech related locations in Switzerland

My wife and I are traveling to Switzerland for the last week in May. I have never been there before. I would appreciate suggestions for time / tech sites of interest to visit. We plan to fly to Zurich, but travel immediately to Geneva and then work our way back to Zurich by train, stopping (at

Re: [time-nuts] Recommendations for Mains Power Monitor / Logger

I expect 1/R^2 would prevent such a scheme from working as the terrestrial transmitters would vary widely in signal strength in a way that GPS satellites do not and could overload the receiver. David N1HAC On 3/12/18 9:54 AM, Peter Reilley wrote: Reading this paper makes one wonder

Re: [time-nuts] Frequency deviations in Europe affect clocks

Can someone please explain why not paying your bills causes the grid and therefore the clocks to slow down?  None of the reports, either for the technical or lay person, give a reason. David N1HAC On 3/8/18 5:00 PM, Pieter-Tjerk de Boer wrote: Hello all, Here's my graph of the mains grid

Re: [time-nuts] HP Xtal Osc Question

ain/redirector.jspx?action=ref=EDITORIAL=1835828=eng=US=-536900194.536895517.00> David N1HAC On 3/6/18 11:50 PM, Perry Sandeen via time-nuts wrote: List, When perusing HP xtal oscillators on ebay I noticed some cases were marked HP 10811 and the same appearing unit was marked HP 10811

[time-nuts] 50 ohm drivers

so ... Thanks David ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Re: [time-nuts] LT1016 as a pulse shaper...

logic gates can result in lower jitter/phase noise. Bruce - do you know ? David -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Ulf Kylenfall via time-nuts Sent: 03 March 2018 17:08 To: Discussion of Precise Time and Frequency Measurement Subject

[time-nuts] Output impedance of MC74VHC logic?

Using this to buffer output from an LPRO (74VHC1G14 (Schmitt trigger 3.3V TTL compatible)), or an Efratom 105243-003 10MHz OCXO with CMS output (74VHC1GU04 CMOS levels) in a 10MHz mod for the KS-24019 RFTGm-II. To match well to 50R bandpass I want to add a series resistor to the output but don't

[time-nuts] Efratom 105243-003 10MHz OCXO

Does anyone know the specs for the 10MHz output of this? I'm looking at a board using it that is terminating it with a 100kOhm resistor to ground. Yeah I know, probe it with a scope - the catch is that the equipment is currently well disassembled so I can't do that so easily ... Is the output

Re: [time-nuts] Lady Heather v6.0 Beta for Windows .EXE file

From: Mark Sims [] I've put a copy of the Windows .exe and documentation comments on EEVBLOG: http://www.eevblog.com/forum/metrology/lady-heather-v6-beta-for-windows-exe/msg1434005/#msg1434005 [] Thanks! David -- SatSignal Software - Quality

Re: [time-nuts] Teardown of Chinese made eBay GPS antenna.

"Some  of you are to young to remember when Javanese products were considered junk same storyBert Kehren" I've lived through Japan, Taiwan, and now China. Who's next?  ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Teardown of Chinese made eBay GPS antenna.

specs they are given. You want cheap crap, they'll build cheap crap. You want top quality, they'll build top quality. On Thursday, February 22, 2018, Van Horn, David < david.vanh...@backcountryaccess.com> wrote: > According to the data sheet, it looks pretty well in spec, and the >

Re: [time-nuts] Teardown of Chinese made eBay GPS antenna.

According to the data sheet, it looks pretty well in spec, and the part has thermal shutdown. http://ww1.microchip.com/downloads/en/DeviceDoc/mic5203.pdf ESD hit maybe? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Furuno GT-8031 breakout board

Never having opened my TBolt, are the GT-8736 boards of use to replace the aging and partly deaf receiver in that? Or for a KS-24019? Thanks Dave -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Gregory Maxwell Sent: 15 February 2018 23:46 To:

Re: [time-nuts] eBay GPS antenna test results.

On 9 February 2018 at 21:43, John Green wrote: > To those who doubted that the antenna was actually a 3.3 to 18 volt design, > it seems you were correct. Today, I hooked it up to a variable power supply > and slowly raised the DC voltage fed to the antenna. It began to pull >

Re: [time-nuts] Anyone have experience with this antenna?

pay the return cost. Dr David Kirkby Ph.D C.Eng MIET Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT, United Kingdom Registered in England and Wales as company number 08914892 http://www.kirkbymicrowave.co.uk/ Tel 01621'680100 / +44 16

Re: [time-nuts] Anyone have experience with this antenna?

In a previous job, I used plastics to "lens" antennas at 2.4 GHz, shaping the patterns for more desirable results. XFDTD is a great software package for this application but it is expensive. ___ time-nuts mailing list -- time-nuts@febo.com To

[time-nuts] UK government study on: Satellite-derived Time and Position - Critical Dependencies

MB and 86 pages. Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk Twitter: @gm8arv ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go

Re: [time-nuts] GPS Jamming

I thank Adrian was being sarcastic :) -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: 29 January 2018 10:00 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] GPS Jamming Wasn't the selective

Re: [time-nuts] Slightly OT: interest in a four-output, ultra-low jitter, synthesizer block?

I used to do SMTIf the solder paste does not absorb moisture when stored it should be OK People have had success with an iron frying pan on the stove . I have used a hot air paint stripper gun with a metal funnel to re flow the paste. There cheap SMT re work stations on Alibaba now <$100

Re: [time-nuts] Suggestion for a timing GPS receiver (Trimble / Ublox /other?)

program to check anything you buy. From Amazon, at least, I got an immediate refund. 73, David GM8ARV -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk Twitter: @gm8arv

Re: [time-nuts] PBS, Tue evening, The Secret of Tuxedo Park

If you have a low cost VPN account, you just need to connect to a server located in the US. Then you can watch it from where ever. Dave W6TE -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Heinz Breuer Sent: Wednesday, January 17, 2018 5:17 PM To:

Re: [time-nuts] PBS, Tue evening, The Secret of Tuxedo Park

Here is the PBS website which includes the full video: http://www.pbs.org/wgbh/americanexperience/films/secret-tuxedo-park/#part01 David N1HAC On 1/16/18 1:14 PM, paul swed wrote: Hello to the group. I did read the book several years ago. Its quite good and I had no idea about any

Re: [time-nuts] Identify RFTGM-II-XO Part

Hi Dan, That would be a MMIC amplifier.  Transistors have Q reference designators.  U's are ICs.  Take a look on the other side for markings.  It appears to have been mounted upside-down. David N1HAC On 1/10/18 12:22 PM, Dan Kemppainen wrote: Patrick, It's possible that's one

Re: [time-nuts] Time stamp degradation being added in javascript

From: David Possibly not of immediate concern to time-nuts but an article had some trigger words for them in the initial fixes to the much publicised problems with Intel/AMD/ARM etc : "After these changes, the time stamp returned by |performance.now| will be less precise due to lower resol

[time-nuts] Time stamp degradation being added in javascript

Possibly not of immediate concern to time-nuts but an article had some trigger words for them in the initial fixes to the much publicised problems with Intel/AMD/ARM etc : "After these changes, the time stamp returned by |performance.now| will be less precise due to lower resolution. Some

[time-nuts] HP nixie counters, free!

Hi All, I have some old HP nixie tube counters (5245Ls) which I would like to give away to a good home. See the attached photo. (Sorry for the poor quality.) Some of them power on, some of them do not. I don't think any of them actually work correctly. They would be good for parts. I am

Re: [time-nuts] HP 105B: Modern replacement for NiCad battery pack?

Memory... :) I've induced the "memory effect" in NIMH cells and Nicad, and lead acid. Simply charge to the same point, then discharge to the same depth of discharge about 10x. In the next cycle, discharge completely and you'll see the bump in pack voltage where you had discharged to

Re: [time-nuts] HP 105B: Modern replacement for NiCad battery pack?

In a former job I designed battery charging systems for NIMH cells. Some cells will TOLERATE long term trickle, some spec ZERO trickle current. Get a data sheet and read it. Violating that spec, or low quality cells can get you a battery pack that will arbitrarily, and without even being

Re: [time-nuts] HP 105B: Modern replacement for NiCad battery pack?

Nicads are still made. NIMH is not necessarily a drop in. While it will work fine in the short term, crude chargers that implement constant trickle like C/10 can be (emphasis) tolerated (/emphasis) by some NIMH cells, and totally out of spec for others. Modern chargers and NIMH is a good

Re: [time-nuts] Stable32 now available

On 5 January 2018 at 14:21, Graham wrote: > Lulu is currently having a promotion with free postage for those > contemplating ordering a copy of the manual from Lulu. > > Get free mail or 50% off ground shipping! > Use promo code *SHIPIT2018* > Expires Jan 8 at 11:59 pm ET >

Re: [time-nuts] Stable32 now available

On 3 January 2018 at 11:08, Poul-Henning Kamp wrote: > > Anyway, code like this can be written to compile and work across all the > relevant *IX operating systems with a minimum of effort, so I don't think > a separate port to any of *BSD, Linux, Solaris or AIX should be

Re: [time-nuts] Stable32 now available

On 3 January 2018 at 04:09, Tom Van Baak wrote: > I asked Bill for clarification and here's some of what he shared: > > > Tom: > > > > I’m glad that the word is getting out that Stable32 is now freely > available. > > > > My donation to the IEEE UFFC included all source

Re: [time-nuts] Stable32 now available

On 2 January 2018 at 14:10, paul swed wrote: > Jelen > Thank you for informing us about Stable32. I have been busy downloading > details. > I was surprised by the size of the use manual at some 348 pages. > I believe I have a very long way to. I suspect we need a Stable32

Re: [time-nuts] Stable32 now available

On 2 January 2018 at 09:30, Matthias Jelen wrote: > Dear Time-Nuts, > > Happy New Year! > > Maybe this is of interest for some of you: > > A copy of Stable32 was on my wish-list for Christmas and I asked for the > possibility of a non-profit-license. Bill Riley informed me

Re: [time-nuts] HP Spec Analyzer FS

I'm interested in it. I think I'm in driving distance from Fresno, CA. Dave W6TE -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Perry Sandeen via time-nuts Sent: Sunday, December 31, 2017 2:38 PM To: time-nuts@febo.com Subject: [time-nuts] HP Spec

[time-nuts] Cheap ($90) time interval counter on eBay

I can't possibly imagine that this is going to have the performance of the high end TI counters, but it might interest someone to have a play without breaking the bank. https://m.ebay.com/itm/ADC-100A-Time-Interval-Analyzer-Tested-Working-/261303897956 Dave

Re: [time-nuts] External cooling fans - source

> deal to them ….. complaints impact the metrics by which they are judged …. > > Bob > > > On Dec 19, 2017, at 12:48 AM, Dr. David Kirkby < > drkir...@kirkbymicrowave.co.uk> wrote: > > > > On 18 December 2017 at 23:11, Charles Steinmetz > > <c

Re: [time-nuts] External cooling fans - source

On 18 December 2017 at 23:11, Charles Steinmetz wrote: > From time to time, the subject of external cooling fans comes up -- for > example, in discussions of the HP 5370A/B with their steaming hot > heatsinks. I have several times recommended very quiet, all-metal, 4"

Re: [time-nuts] H-maser drift

Yes, Thank you John. Enjoyable reading and informative. Dave W6TE Sent from Mail for Windows 10 From: time-nuts on behalf of John Ponsonby Sent:

[time-nuts] "Timekeeping today – from stars to atoms" lecture by Peter Whibberley of NPL, organised by IET.

This might interest some. It's on 6th December in London.

Re: [time-nuts] Favorite counters (current production)?

On 10 November 2017 at 16:37, Bob Camp wrote: > Hi > > There is no perfect answer. I’d go with the 53230 simply because it > *might* be supported > the longest. > > Bob > If I had to take a bet, I would say the SR620 will be supported longer. Stanford Research seem to be selling

Re: [time-nuts] UltrAtomic clock.

with an evaluation receiver in Kangerlussuaq, Greenland last spring. David N1HAC On 11/5/17 11:36 AM, Mike Garvey wrote: My Ultratomic properly made the transition back to std time this morning. I am in the Boston area. Mike -Original Message- From: time-nuts [mailto:time-nuts-boun

Re: [time-nuts] Holdover, RTC for Pi as NTP GPS source

From: David C. Partridge ? RasPi-4? Not released until 2019 AFAIK ... I have RasPi-3 === My Raspberry Pi #1 and Raspberry Pi #4. See: http://www.satsignal.eu/mrtg/performance_ntp.php Cheers, David -- SatSignal Software - Quality software written to your requirements

Re: [time-nuts] Holdover, RTC for Pi as NTP GPS source

? RasPi-4? Not released until 2019 AFAIK ... I have RasPi-3 -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of David J Taylor via time-nuts Sent: 01 November 2017 16:08 To: time-nuts@febo.com Subject: Re: [time-nuts] Holdover, RTC for Pi as NTP GPS

Re: [time-nuts] Holdover, RTC for Pi as NTP GPS source

of the house with indoor patch GPS antennas. http://www.satsignal.eu/mrtg/performance_ntp.php Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk Twitter: @gm8arv

Re: [time-nuts] current crop of GPS receivers for Rpi/Beaglebone for NTP server/etc

I used https://store.uputronics.com/index.php?route=product/product=60_64_id=81 and I'm happy with it. Good instructions. On Mon, Oct 16, 2017 at 2:46 PM, Hal Murray wrote: > I don't know of any no-wire setups for the Beaglebone. (I somewhat > remember > one, but it

Re: [time-nuts] current crop of GPS receivers for Rpi/Beaglebone forNTP server/etc

le from US and UK sources: https://v3.airspy.us/product/upu-rpigps/ https://store.uputronics.com/index.php?route=product/product_id=81 Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-

Re: [time-nuts] precision frequency/time/amplitude reference

Jim, If I understand what you are attempting (I may well not), you might consider the approach taken here: https://github.com/tejeez/rtl_coherent and here: https://github.com/tejeez/rtl_coherent/blob/master/hardware/simple/README.md or order a noise-source and antenna switches from here:

Re: [time-nuts] R XSRM Rubidium Standard

On 15 Sep 2017 10:45, "Scott McGrath" wrote: > > Precisely my point, But when purchasing i expect to pay for a calibration at a minimum. I have on occasions requested sellers to send an item to the manufacturer (Agilent or Keysight) for calibration *before* shipping it to

Re: [time-nuts] Very large X9.2 solar flare.

No, the flare also produced a CME, which is expected to reach us tomorrow and may (hopefully?) trigger a G-3 class geomagnetic storm. http://www.spaceweather.com/archive.php?view=1=07=09=2017 David N1HAC Dartmouth College Dept. of Physics and Astronomy Space Physics Group (Yes, I am a rocket

Re: [time-nuts] Very large X9.2 solar flare.

It also produced a CME. Read the note on spaceweather.com. David N1HAC On 9/6/17 5:19 PM, Alan Melia wrote: The flare has been and gone!...is this another case of journalists mixing up a flare with a CME ? Alan G3NYK - Original Message - From: "Mark Sims" <hol..

Re: [time-nuts] PLL book 3rd edition

That's good news. It would be good to have a single reference for noise correlation. Dave On Tue, Aug 15, 2017 at 7:04 AM wrote: > Good Morning all , > > yes , it became non trivial but Enrico agreed to take over the old chapter > 2. He thinks I do not use IEEE norm

Re: [time-nuts] How well does GPS work in the Arcitic?

. Does anybody have (non-Windows) code to that? === Hal, GPS worked fine for me on a cruise including 80 degrees north. Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk

Re: [time-nuts] PLL book 3rd edition

Ulrich - Did anyone ever agree to help update this? Regards Dave On Fri, Mar 11, 2016 at 3:13 PM, KA2WEU--- via time-nuts wrote: > > Why don't you look at the outline to determine what might be needed or > missing . > > Ulrich > > > > > In a message dated 3/11/2016

Re: [time-nuts] Can Lady Heather set PC time directly from aTrimbleThunderbolt?

;. Not my area of expertise, but GPS time and UTC aren't the same - GPS time doesn't use leap-seconds, for example, so it's many seconds off from NTP. Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.

Re: [time-nuts] Can Lady Heather set PC time directly from a TrimbleThunderbolt?

/index.html I have a PPS/GPS attached to several Windows-10 PCs for better timekeeping - down to the hundred-microsecond level: http://www.satsignal.eu/mrtg/performance_ntp.php#windows-stratum-1 73, David GM8ARV -- SatSignal Software - Quality software written to your requirements Web: http

Re: [time-nuts] Can Lady Heather set PC time directly from a TrimbleThunderbolt?

of Dave? Cheers, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk Twitter: @gm8arv ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https

Re: [time-nuts] Can Lady Heather set PC time directly from a TrimbleThunderbolt?

://www.satsignal.eu/ntp/Sure-GPS.htm Windows works internally in UTC, just choose your time zone from the Control Panel. I'm guessing that you mean UK local time, as GMT and UTC are the same (at least as far as wall-clock time is concerned). 73, David GM8ARV -- SatSignal Software - Quality software

Re: [time-nuts] Trimble Thunderbolt no longer determines the correct date

Hmm.. Just a while ago, I watched the heather display on ours go to 12:59:59 and stop... Still giving me 10 MHz though which is all I really need. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] Trimble Thunderbolt no longer determines the correct date

ver the years ….AFIK, there isn’t even a “public” firmware loader for the TBolt. Indeed, you might get lucky. Bob > On Jul 31, 2017, at 5:27 AM, David C. Partridge > <david.partri...@perdrix.co.uk> wrote: > > I emailed Trimble on the off chance they might have a firmware upgr

Re: [time-nuts] Trimble Thunderbolt no longer determines the correct date

I emailed Trimble on the off chance they might have a firmware upgrade. They sent me an email which covered some units that rolled over in Feb. 2016 for which they say they have no upgrade. I sent them all the information on the label stuck to the outside of my TB (one of the group buy set),

Re: [time-nuts] Trimble Thunderbolt no longer determines the correct date

not report position properly (all zeros). After reset, once it got its initial fix it was reporting a date in 1997, but reports correctly now that the time and date were set (also using the $PGRMI command). It even has the current GPS week (1959) correct. David N1HAC On 7/28/17 11:36 AM, Dave B via

[time-nuts] Problem behind failing Galileo clocks identified

"Investigators have uncovered the problems behind the failure of atomic clocks onboard Galileo satellites, the European Commission said." See: http://galileognss.eu/problem-behind-failing-clocks-identified/ May be of some interest. Cheers, David -- SatSignal Software - Qualit

Re: [time-nuts] unknown GPSDO

ISTR that you started it with a short time constant to get locked, and once you had lock you would increase the time constant in a few steps to a final value of (say) 1000s or so. Dave -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Volker Esper

Re: [time-nuts] Toggle switch wiring for RFTGm-II (KS24019)

wiring for RFTGm-II (KS24019) Hi! On Wed, Jun 28, 2017 at 04:17:20PM +0100, David C. Partridge wrote: > The Lucent manual refers to a toggle switch in the frame to switch the > active module in the RFTGm-II (KS24019) from the Rb to the XO. Unfortunately I cannot answer your question. I hav

[time-nuts] Toggle switch wiring for RFTGm-II (KS24019)

The Lucent manual refers to a toggle switch in the frame to switch the active module in the RFTGm-II (KS24019) from the Rb to the XO. I have the complete shelf with both units and currently the Rb is the active module, and the XO is standby; but sadly there's no switch on the shelf itself. Does

Re: [time-nuts] Something for all TIME NUTS!!

On 27 June 2017 at 23:02, Don Murray via time-nuts wrote: > Hello all... > > For the SERIOUS time nut... you might want to give yourself a few hours > before you go check out this site... and beyond!! > > 73 > Don > W4WJ > > >

Re: [time-nuts] Tracor 527A and 10MHz reference input

WB8TSL On Sun, Jun 25, 2017 at 2:25 PM, David C. Partridge < david.partri...@perdrix.co.uk> wrote: > Yes, does indeed look like it should be 4K7! > > -Original Message- > From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of David C. > Partridge >

Re: [time-nuts] Tracor 527A and 10MHz reference input

Yes, does indeed look like it should be 4K7! -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of David C. Partridge Sent: 25 June 2017 18:50 To: 'Discussion of precise time and frequency measurement' Subject: [time-nuts] Tracor 527A and 10MHz reference

[time-nuts] Tracor 527A and 10MHz reference input

A friend says his Tracor 527A works fine with a 10MHz Ref input even though it doesn't have the divide by 2 circuit from the addendum to the 527E manual applied. I'm puzzled by this - I can't quite see how the reference input circuit can produce a 5MHz output when fed with 10MHz (unless his

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